Street indicator



May 15, 1923.

'W. A. WILSON ET AL STREET IINDIBATOR Filed July 15. 1921 3 Sheets-Sheet l INvnNTog. WALTER A Mmmm. SYDNEY NlLsoN.

W. A. WILSON ET AL May 15, 1923.

STREET-INDICATOR Filed July 15. 1921 3 Sheets-Sheet 2 INVENTORS' SYDNEY W1 LSG May fs; 1923.

W. A. WILSON ET AL I STREET INDICATOR l Filed J'u1y` 15 1921 :s sheetssheet INYBNTORS. WALTER AMILSON. SYDNEY www.

' vand ban-d.

Patented May 15, 1923.

Y WALTER ALEXANDERwiLsoN AND' SYDNEY Winsen,` 0F COLUMBIA., CANADA.

` sain-EET INDIcii'ion t nppiication'iuea Juiy 15, 1921." serialguofiaiesfi. 4

T 0 all whom it 'may concern." I

Be'it known Athat we, WALTER \ALEXANDER VILSON and SYDNEY VILsoN, both subjects of the King of Great' Britaiinan'd both residents of th'evcity of Vancouver, in the Province of British Columbia, Canada, have vinvented certain new and useful 'Improvements in Streetlndicators, of which the following is a speciicationj' l i i Our invention relates to yimprovements-in street indicators, land the object of our invention is to provide a device adapted for installation in street carsbyr means of which tlie'nanies of the'streets past whichthe' car travels maybe indicatedin a simple manner to the passengers prior to the arrival of the ca'r thereat, and which device is simple in construction and operation, requiring the minimum amount of attention on the part of the operator since it is lprovided with a positive stopping and spacing meanswhereby the movement of the band on which, the street names are displayed is automatically l controlled.

Ne attain this object by the construction fillustrated in the accompanying drawings in wliicliv Fig.l 1 is a face view of the device.

Fig. 2 is a view of the mechanism.

f Fig. 3 is a sectional relevation take through line 3-3 of' Fig. 2.

Fig. 4 is a detail view in part section'of a f band roller. f y

Fig. 5 is a fragmentary view of one rend of a band roller.

Fig. 6 isa partial ing mechanism. y

Fig. 7 is an end *view o'fFig. 6." 1 Fig. 8 is an end view 'showing'the contact arm and ring. i

Fig. 9 is a side View of Fig. 8.

view of the 'gear shift- Fig. 10 yis a detail view ofthe spacing.

roller stop pin.

Fig. 11 is adiagrammatic viewfof the cir-` I A y vvthe opposite directionthe shaft' is mounted -foi longitudinal movement'fandis operated cuit wiringf y. l fr FigxlZ is a detail. view ofthe brake drum n Similar figures of lar parts throughout the several views.:

" The device consists rofa casing 1, formed.y

' of any suitable Amaterial. A.and of any preferred shape, having one side provided with a display opening 2. vRot'atably mountedv `within the `casing adjacent its upper and llower endsV are .upper and. lower rollers 9 Aby'means of a suitablyymounted shaft 6 Abearing by means of a `set screwl, land` Lat reference indicate' 4simiv-ucony'iin, BRITISH.

and 4 respectivelyito which the ends'bofva band or'ribbon 5 are secured and on-'which the Vribbon may lbe Iwound bythe rotation of the rollers, the rotation being iefected providedA with bevel gears 7 and 8 adapted to mesh with bevel gears 9 and'10.d'etachably connected to the rollersB and 4. These gears are connected Vto the vrollers as shown more particularly in Fig. '4, that is, the' roller, indicated by the numerall 3, is mounted rotatably on a shaft 11 vwhich `extends through a bearing 12 secured to the casing 1 on 4one side, beingheld stationary Ain the its opposite end .thisshaftisy formed as a fneedle-point bearing 14 and' engages a c0mplementary Vrecess 15 formed in the inner end of ashort length of shaft 16to which the bevel gear 9 is secured by asetscrew 17,

'mou-nted. onthis shaft is a :sleeve18 vthe innerend ofwhich is provided witha slot 19 adapted to slidably engage'an integral key 2O formed on theend of the roller 3l andthis sleeve is rotatablyv mounted in a bearing 21 secured `to thecasing on the.` side opposite to bearing 12 and vis secured tothe shaft 16 by means of a set screw 22 passed through a :collar 23 into the shaft, from which it will be seen that rotation ofxthe bevel' gear `9rotates yshaft 16 and sleeve 18 .and consequently the roller 3,. butthat the v.roller may be removed from place by remov- .iing the set screw -lyenabling the;r shaft 11 to be 'withdrawn anduthefroller taken out so `'that another roller may be substituted when required. For the easy withdrawalof shaft -11 it ispprovided with .al gripping pin 24. 'The `foregoing description applies. to f construction of the lower roller4'.-

As the gears 7 and 8 mesh alternately with thev` gears 9 andvl() that is, one set of gears is usedI for, driving.` thev mechanism in one direction and the other set for drivingit 1nv to carry the gearsiand 8 into or outof mesh respectively with gears v 9 and 10..byf any suitable mechanism,xsuchl as. 4the rack: and

pinion mechanism, indicated respectively by 4the .numerals25 Vand Q6 in'FigsQ, 6 and 7, the rack being connected'to the rshaft' and mounted, so thatby pulling or pushing the rod 27 theshaft 6 may be moved in opposite directions, as required, to operate the machinev to movethe band in forward or backward directions. f

29 and 30 indicate guide rollers for the band or ribbon 5, which passes around them and a spacing roller 31 rotatably mounted near the upper roller 3, the circumference of which roller 31 is equal to the depth of the display opening 2. This roller may be oi' any suitable material but at one end it 1s provided` with Jacylindrical member 32 'formed of liber or any other insulating material on which member 32 are mounted three `brass cylindrical rings 33, 34 and 35 spaced y apartl from each other but connected together so as to belin electrical contact with each other, asdescribed'later, by a brass bar 36, as shown in Figs. 8, 9 and 11. Ring 33 is continuous as to its peripheral circuinin Fig.y 9.

`ference butthe peripheral circumference of eachr of the rings 34 and 35 is broken, that is, these two rings lare divided and between the divided ends are inserted vulcanite portions 37 and 38, the portion 37 being of greater length than the portion 38, as shown arms secured at vone end to a suitable support 42 while at their opposite ends they are provided with suitable adjustable contact screws 43, 44 and 45 adapted to bear respecthe dotted lines, through the side of the casing and is ofsuch tively on the peripheral surfaces of the rings 33, 34 and 35, and each contact arm is further provided with a terminal, 46, 47 and y48 respectively, to which certain of the elecv trical circuit wires are connected, as hereinafter described In order to hold the spacing roller 31 against inadvertent 'displacement when ro- ,tating the rollers'3fand 4, as for instance, when winding or unwindingtthem by hand i when changing bands, a screw 49 is fitted into the side of the ,casing 1, as shown in Figs. 2 and 10, the casing being indicated by which length that it may bev screwed into a countersunk recess, indicated by the numeral 50, formed in the iibre cylindrical member 32,

`as shown' in Fig. 9, and the relative position of the screw and recess is such that Vwhen thescrew is seated in the recess holding the roller against movement the contact screws 44-and 45 'are centered on their respective vulcanite portions y37 and 38, that is to say,

i. the machine is set for, starting.

- `51 indicates a roller disposed against'the i band 5 tokeep it in contact with the roller 31,y which' roller 51 is supported in arms '52 and 53secured Yto a transverse shaft 54,

to which shaftzis secured an arm 55 which extends towards oneend of the casing, and

through the free end of the armextends a' vertical stationary rod 56 on the upper end 39, 40 and 41 indicate contact,

screw extends of which is mounted a nut 57, between which nutand the arm is disposed a spring 58, fromA which it will beseen that theV spring, bearing kdown on the arm, maintains the roller 51in spring contact with'tlie band 5y andthe spacing roller 3l. k A small electric motor 59 is mounted within the casing 1 and its driving pulley 6() is belt connected to a pulley 61 on a counter` shaft 62 having avworin 63 on one end mesh ing with a worm wheel 64secured to a yshaft 6 whereby the latter is driven, while towards V d its opposite end theshaft is provided `with a lbrake drum 65 aroundv which `is passed brake bande, 66 of any suitable material such as leather, steel, or the like, this band being secured rat its ylower `end, as4 at 67, while its opposite A,end is connected to. a rod 68 rthe oppositeA end of which vis connected toa lever 69, which lever is4 pivotally conneet-ed at its lower end to a suitable support` 70 while at its upper end'it is connected to a leverf71 by an adjusting rod 72, the lever 71 being also pivotally connected at its lower end to the support 7,0. The rod 72 isextended at the end remote from the lever 71 and to the extended end yis connected the means of an adjusting screw 79,v as shown`A in Figs. 2 and 3.

The circuit wiring for operating the device is as shown more particularly in Fig. 11 in which the magnet, indicated generally by the numeral 80, the motor 59, the spacing'roller 31, therings 33, 34,35, and the contact arms 39, 40, 41, are illustrated, it being understood that rthere ,is Lone main circuit common to both the motor land the magnet and usedfor the operation ofboth.

The circuitwiring is as follows :-"-81 indi-` cates a bar to which are led live wires, two` of them 82 and 83y beingA the main wires from the source of currentfand 84, 85 and 86 being switch wires connected to any approved form of switch,which may be the manually operated push button type, as in- Ldicated at 87, or itinay be a mechanically `operated switch, if preferred. Vir'e 82vis vconnected Ldirect to the contact arm 39 associated with ring 33, while wire 83 is dieV vided into two branches, one of which 83L is led to one motorr terminal while the other 83h, is led to one magnet terminal.. From i Contact arm 41 associated withring 35 a wire 88 extends to the other motor terminal,

thus completing the motor circuit Wiring,

Lio;

. the main'ivires' 82 and 33v to the magnet, ter-- @vulcanite terminal, thus-completing the magnet circuit Wiring, From the switch- 87,I which has three contacts, the Wires 84, 85 and 86 are` led to the respective contact arms39, a and 41 so that these .Wires are therefore iirelectrical contact Witlithe respective rings 33,

and when-thesavitch is closed.

yThe operation is-'as follows, it being understood-that when theV machine is stoppedthe Contact screws 44 and 45 ofthe .contact arms a0.- and 41 are in contact-Withl therespective ortions y37211161.38 of the rings and 35. o startthe machine the switch 87 is momentarily closed so that current passes through Wires 85 and 89 to the magnet and Wires 86 and 88 to'themotor, themag'net and motoriy circuits being completed through Wires 82 and S3, thus energizing the magnet and `drawing theilevers 71 `and 69 back by the attractionof ,the block 7.6 to the yoke 7 7, thus engaging the-brake band 66 oil the drinn 65, and leaving the countershatt' 62 free tourotate, which rotation takes place simultaneously-With' the easingof the brake band, since the motor,- starts also. .The switch-is then opened, when .the motor continues to run,

.since althoughvno current passes through '30.,

Wires 34, 85, and 86, it passes from thefinaiii lWires 32and-83 to the motor terminals through Wires 83a and 88 to ring 35, and then through the bar 3G to 'the ring 33 and Wire 82, thus making a complete circuit in which themotoris disposed While it passes from minals through Wires 831 and 89 to ring 35 and thence throughy bar 36to ring 33 and Wire 82, thus making a ycomplete circuit in whichv the magnet is disposed so that the motor continues to run yand the magnet remains energized until a 'revolution of the spacing roller 31 is completed andthe insulated portion 37A and v38 carried round into contact 'with their respective contact screws, when ,the electrical circuit is immediately broken,

the .motor circuit first, sincethe vulcanite portionf38 is Ylonger than the -vulcanite portion 37 and thus comes'in Contact soonerwith the contact, thus stoppingthe Ymotor and Vdeenergizing` thepmagnet, Wheiithe spring 73 pulls ltli'e leversv 69 and 71in the reversefdi-r reaction-and tightens upthe brake Aband lfon the. drum so vthat further rotation vof the ,f

countershaft 62. andspacing roller 431 `is immediately and positively prevented; until the Aswitch 87 is closed,1ivhen the operation' Vjust described is repeated.:l a. v

'It will be` seen, therefore, that through the operationaof. the motorthe rollers 3 and -lare also operated'thus moving the band past the l displayropeningand asthe circumference of thespacing roller isequalto the distance the ribbon travels at each movement it Will be A, seen that the travel of the ribbon is thus automatically 4and positively controlled without attention on tliepart of.` the operatorI Whoseg lonly care is to first close the switch 87 and then openit..

` lVliat We claim as .our invention is :i

1. In astreet indicator, a casing having a display opening, 'a`v band bearing` street naines, mechanism for moving said band pastthe displayopening including a brake drum,

an electric niotor'for operatinglsaid mechamsm, aiband operated roller `having one end yprovided with three spaced metallic rings'in metallic connection with each 0tl`ier,-the peripheryfof each 'ringbeing designed to form 1an electrical current path one continuous and the remaining two interrupted by the insertion therein of a vulcanite -porti'on,"a suitably supported contact arm for each ring forming circuit terminals bearing respectivelylon the continuous path andthe interrupted onesya magnetically yoperated 'brake band associated Wit-li said brake drum, and an electricalcircuit .in which said "rings, said arms, saidvmotor, and thebrake magnet are disposed.

2. ln a street indicator, a casing having-a displayl opening, a band bearing v,street names, mechanism for moving saidr band past an electric motort'or operati-ng said mechanism, a band operatedrollerhaving one ,endl

formed ,as an electric-al circuit terminal, va suitably supported terminal adjacenttlie' controlled by the band rollerterminal.

names, mechanism for moving said band past the display opening, an electric'inotor for operating said mechanism, a band operated rollerhaving one end provided with spaced metallic rings` in metallic 'connection with each other,.the periphery 'of each ring being `designed to'form an v`electricalcurrentv path the display opening including a b raledrum,v f

' ln a street indicator, a casing having a display' opening, a band bearing street 4v105 one continuous and the otherinterrupted by the insertion therein Aof avulcanite portion, .a suitably supported "contactvarm for Veach ring forming circuitk terminalsbearing-respectively on the continuous ring and tlie`iii-,

terrupted one, and anr electrical ,circuit in are disposed.

a `band f bearing f street.

operating said mechanism7 a bandoperated roller-the circumference oliwhich is equal to the length of the display opening having" one Whichsaid motor, said rings, and said' armsendr provided With spaced metallic rings in metallic connection With each other, theperipheryiof each ring being designed to .form

an electrical.cui'rent'path. one continuous and kone interrupted by the insertion thereinA of a vulcanite portion, a suitably supported contact arm for each ring forming circuit ter- Lininals bearing respectivelyonthe continuous one and yon the interrupted one,laii` electrical circuit in which said motor, said rings,

and' said arms are disposed closed Whenthev arms'are in contactl with the uninterrupted y --rings and broken when the Contact arm and vulcanite portion are in Contact, and means for holding said band operated roller 'against' *inadvertent` movement when the'eircuit is broken.r

5. In a streetA indicator, a casing having a display opening, va band bearing street naines, mechanism for-moving lsaid band past the display opening including a brake drum, an electric motor for 'operating said mechanismfa band operated roller having one. end formed as an electrical ycircuit terminal, a suitably supported terminal adjacent the band rollerterminal, a brake bandaround said drum, said band being secured vat one end and `connected at its opposite end to a lsuitably pivoted arm,

an `armature pivotallysupported on f said arm, a magnet the poles vof which are disposed .inproximity to said armature, a coil .associated with said magnet, andan electricalcircuit in which said motor, and said coil are disposed controlled by the band roller terminal.

6. In a street indicator', a casing having a dis ala o enino' u Aer and lower rollers therein each vadapted* to act respectively as delivery or receiving roller and provided with a key extension on one end, stationary shaftsremovably mounted in said casing .on which'said rollers are freely mounted,a sleeve vfor each roller rotatably mounted onsaid casing provided at one end `with a slot detachably engaging the roller key and at vits opposite endwith a gear, aL rotatable shaft having gears on its opposite ends adapted to co -aet with thesaid sleeve gears, said shaft being longitudinally inovableto carry its opposite end gears into or out of engagement with their `respective sleeve gears, means for rotating said shaft, and a band vbearing street names extendingbey tween said -upperand Llowerrollers adapted `to be unwound oif the one on to the other kto pass the display opening. by the rotation of the said longitudinally movable shaft.

7.' In a street indicator, aI .casingliaving a display opening,.upper and lower rollers therein `each adapted to `actrespectively as a `delivery or receiving roller. and provided with a key extension on one end, stationary shaft. y

l 8. In avstreet indicator, a casing having.

rotatablyv mounted on the casing fitted' .'withyan exterior sleeve having al slot .de-

tachably engagingjits V'respective roller-'fkey and on its outer end with avgear, a rotatable shaft having' gears on its vvopposite ends .adapted to 4co-acty withv the .said dividedy sha-ft gears, said shaft'being longitudin'allyk movable to carry theopposite end gears into or out offengagement vw-itlitheir respective divided shaft gears, means for rotating said shaft, anda band bearing street names eX`` tending between said upperr and lower rollers adapted to be unwound off-the one o n to the other to pass the display opening by the rotation of a display opening, upper and lowerrollers therein each'adapted to actfrespectively as aI delivery or receiving, roller and provided with akey `extension on one end," stationary shafts removably mounted in said casing on which said rollers are freely mounted, a

sleeve for each roller rotatably mountedon `said casing provided atvone end with a slot detachably engaging the roller key andat its opposite end with a gear,' aA rotatable shaft havinggears on itsopposite ends adapted to co-act with the said sleeve gears,

said.A shaft being longitudinally Amovable to i' `carry its opposite end gears into or out of engagement with the sleeve gears and being provided with a worms, a countershaft having a 'worm gear meshing with said Worm,

. an' electric motor, a' driving connection between said motor. and said countershaftwhereby said longitudinally `movable `shaft .is driven by the operation of the motor,v

and a band bearing. street names extending between said upper and lower rollers adapted to be unwound `off theA one on tothe otherl past the `display opening by the` rotation of the longitudinally movable shaft; 4 l 9.111 a street indicator, a casinghaving-a display opening, upperfandlower rollersy therein each adapted to fact'frespectively as the said longitudinally movable a delivery orreceiving `Iroller f andV provided with a keyeXtensiOn on one end, stationary shafts removably mountedin said-casing on which said rollers .-are'freely ymounted,4 a sleeve for eachroller rotatably mounted on said easing provided at one end V.vv-ithv a'slot detachably engagingk the roller key l'andat its opposite end with a. gearl ar rotatable shaft' having gears onfv itsj'-oaposite endsl adapted to colact with the" saidsleevegears,

saidshaft being longitudinally movable to carry its opposite end gears; into or out of;

engagement with the sleevel gears and being lprovided with a worm,.a countershaft hav-v ing a worm gear meshingr with said worm, an electric motor, a driving 'connection between said,` motor and said vcountershaft whereby said longitudinally movable shaft I is drivenby the operation of the motoryaf 4brake drum secured to said counter-shaft, a

- f brake band around said drum, electro-magnetic means for tightening saidbrake band on said' drum and a band bearingstreet naines extending between said upper and lower rollers adapted to be unwound oil:1 the one onto the otherpast the display opening by the rotation of the longitudinally movable shaft.- t

10. In a street indicator, a moveable dis-` play element carrying vstreet designationsA coincident mechanical setting of the brake.`

ll. In a street indicator, a display element carrying street designations arrangedtobe successivel ldisplayed by intermittent move-` ment of tiev display element past a sight opening or its equivalent,.mechanism for moving the display element,v an electric motor for driving said mechanism, anormally set brake co-acting with saidmechanism, said brake being'adapted yto rloe set` mechanically to stop operation of the mechanism and released,electromagnetically to permit its operation, a manually operable switch in circuit with the motor and the electro-magnetic brake frelease means adapted to be momentarily closedto `start the. motor and permit coincident` release of the brake, and means operable vto keep the.

motorf and brake release means circuit closed after reopening of the switch iwhile the mechanism vmoves' the display element the predetermined distance, said circuit being then automatically openedto s'top the motor and permit coincident mechanical setting of the brake.

i l2. A street indicator comprising a web having street designations thereon, a pair of winding reels carrying' the web, a reel drive mechanism, a motor for driving said mechanism, and a brake mechanism co-acting with the reel drive mechanism, said brake being adapted to be set mechanically coincidently with the stoppage of the motor and released electro-magnetically coincidently with the starting of the motor.

13. A street indicator comprising a web having street designations thereon, means v for moving the web, including an electricy motor, a brake mechanism co-actin with the said means, said brake being a apted to be set mechanically coincidently with the stoppage of the motor and to bereleased electro-magnetically coincidently with the starting of the motor, andlmeans forautoi matically opening themotor circuit to stop the motor vandwpermit` the coincident mechanical settingv of the brake when the web hasbeen moved Vthe desired extent. i

lhln a street: indicator, acasing having a displayv opening, a `band lbearing -jstreetf names, motor-driven mechanism for moving` said handl past the display opening, and a circuit lin which said motoris disposed arrangedso that when momentarily closed and then opened the motor starts lto initially move theV band, and .means associated with said band` adapted to again closethecircuitv on such initial movement whereby the motor operation is continued to complete `the band movement;

15. In a street indicator', a casing 4having il a display opening, aA band* bearing street names, motor-driven mechanism 'for moving-` band'past the display opening. a `circuit in )which said inotor'f is` disposed rarranged so that'when momentarily closed and then opened the motor startsto initially move the band, means associated with said hand adapted to again close the circuit on such `initial movement whereby the motor operation iscontinued to complete the band movement, and means for automatically stopping` the motor afterl a predetermined period of operation.

' 1G. Ina street indicator, a casing having a vdisplay opening, ya band'bearing street names, motor-drivenmechanism for moving said band past the display, opening,- a circuit in which said' motor is disposed arranged so that when momentarilyclosed'.and then fio opened the motor starts to linitially'move the I band, means associ'atedv'with said vband adapted to again closethe circuit on'sucli initialmovement whereby the motor operation is continued to complete 4the band movement, andineans for stopping the motor instantaneousiy after a predetermined period yoit rotation.

A17. In a street indicator,` a casing having a display'opeiiing, a band bearing street i naines, inot-or-dr iven mechanism for moving said band past the display opening, a motorstartingcircuit adapted to be momentarily closed `to start the motor and then opened to impart an initial movement tothe band, and

a normally open motor-operating circuit arranged when closed to continue the operation of tlie motor after the motor-starting' circuit is opened,

and means controlled by said band for closing said motor operating f circuit. l

18. In a street indicator, a casing having a display opening, a band bearing street names, motor-driven mechanism 'for moving said band pat the displayopeiiing, and

normally open combination motor-starting i and inotorolicrating circuit, the motorstarting circuit being arranged to 'start the motor when momentarily closed to initially move the band and the motor-operating circuit tocontmue the operation -of the motor' Whenthe motor-starting circuit is opened,

said motor-operating circuit including circuit-closing' means adapted to be brought into operation through the initial movement i of the band.l

19. In a `street indicator,a casing having. a display opening, a band bearing `street names, a motor-driven mechanism for moving said band past the display opening, and a normally open combination,motor-starting `and motor-operating circuit, the motor startingcircuit being arranged to start themotor when momentarily closed to initially move the band and the motor-operating circuit to continue the operatioii'ofv the motor when the motorstarting circuit is opened, said motoroperating circuit vincluding circuit closing means adapted to be brought into operation through the initial movement of thevband to `then close the circuit and maintain it closed throughout movemeiitof the band past theL display opening.

20. In a street indicator, a` casingv having` display opening, a band bearing street naines, a motor-driven mechanism `tor moving said band past the display opening, and a normally, open combinati-on motor-starting and motor-operating circuit, the m0tor-starting. circuit being arranged to start the motor when momentarily closed toinitially move the band and the motor-operating circuit to continue the operation of the motor when the motor-starting circuit is opened, said motor- "operating-circuit including circuit closing means adapted to be brought into operation through theinitial movement of the band to .close thexcircuit, said means being also adapted to openy the circuit atthe termina.

tion ofthe movement ot' the band past the display opening.

21.k In' a street indicator, a casing having a display opening, a bandv bearing` street names, a motor-driven mechanism for moving said band past the display opening, vand kanorinally open combination motor-starting and lmotor-operating` circuit, the motor-A starting circuit being arranged to start vthe motor when momentarily closed to initially move the band and the motor-operating cir-A cuit to continue the operationof themot'or When'the motor-startingcircuit 'is opened, said linotoroperatin'gf circuit including' circuit closing means adapted to be brought into operation tliroughthe initial movement. of the band, said meansfbeing adaptedto' open the circuit automatically at the termination of the. movement of the band vpast the display opening.

22. In a street indicator7 a casing having a display7` opening, a band bearing street names, motor-driven mechanism for moving said band past the display opening, `a nor.-

malty opencombination motor-starting and motor-operating circuit, the motor-'starting circuit being arranged to start the motor when momentarily closed to initially move the band and the motor-operating circuit to continue the operation ofthe motor When thel ino'torestarting circuit is opened, Aand anele mentdisposed iii said circuit `adapted to be moved by and concurrently With said banda distance equal to the depth of the'display opening, said element being adaptedon the initial movement ofthe band to c loserthe B. uns' Second 

